I've had this happen sometimes in the linux client, and always in the windows client on wine, after a random amount of time, more characters render, but not all. The problem is most likely a regression in nVidia's driver at least since 295.xx

I use 2 different machines, this bug always occurs in one of them. Both machines are pretty much identical in software: Xubuntu 12.04 64bits, nvidia 310. The main difference is in hardware, the one that works perfect has an i5 2500 and gtx460, the other one where the bug manifests, has a core 2 7200 and 9800 gt.